ELONGATEDSNAIL t1_iueweth wrote on October 30, 2022 at 8:19 PM

Reply to comment by MadLintElf in Fires from exploding e-bike batteries multiply in NYC — sometimes fatally by zsreport

Its extremly difficult to compartmentalize batteries and have them fit a nice form factor to fit inside pevs. Most bats I've seen are Lion which are really just 24+ single cell batteries spot welded together. I suspect some of these welding are shotty. Also i see a lot of people riding in the rain... yeah that does not mix. Even with claims that your device is waterproof. Don't think anything will change until battery tech gets much better.

MadLintElf t1_iuf09oc wrote on October 30, 2022 at 8:45 PM

Rivan does it with there vehicle batteries, Tesla does it as well. At my hospital we use mobius batteries, they last 8 hours but I've seen them disassembled and they are just a bunch of separate batteries.

It is more costly, but like the mobiuis battery I mentioned above, when one battery goes it's just one battery, a bit of smoke and that's it. The crappy one's do have bad soldering and nothing to keep that cascade from happening.

RSquared t1_iufn68m wrote on October 30, 2022 at 11:25 PM

Most PEV battery packs are just 18650s in combination of series/parallel, e.g. the most common e-skateboard pack is 3s10p (3 series of 10 parallel batteries, usually Samsung 30q or 25r 18650s). Add a voltage regulation board and you've got a PEV battery.

I know some DIY battery-makers and they're crazy like lacrosse goalies. But it's way cheaper to make a 4s12p battery that can do 35mph with 40 mile range than to buy one.